Struct tracing_subscriber::layer::Identity
source · [−]pub struct Identity { /* private fields */ }
Expand description
A layer that does nothing.
Implementations
Trait Implementations
sourceimpl<S: Subscriber> Layer<S> for Identity
impl<S: Subscriber> Layer<S> for Identity
sourcefn on_layer(&mut self, subscriber: &mut S)
fn on_layer(&mut self, subscriber: &mut S)
Performs late initialization when attaching a Layer
to a
Subscriber
. Read more
sourcefn register_callsite(&self, metadata: &'static Metadata<'static>) -> Interest
fn register_callsite(&self, metadata: &'static Metadata<'static>) -> Interest
Registers a new callsite with this layer, returning whether or not
the layer is interested in being notified about the callsite, similarly
to Subscriber::register_callsite
. Read more
sourcefn enabled(&self, metadata: &Metadata<'_>, ctx: Context<'_, S>) -> bool
fn enabled(&self, metadata: &Metadata<'_>, ctx: Context<'_, S>) -> bool
Returns true
if this layer is interested in a span or event with the
given metadata
in the current Context
, similarly to
Subscriber::enabled
. Read more
sourcefn on_new_span(&self, attrs: &Attributes<'_>, id: &Id, ctx: Context<'_, S>)
fn on_new_span(&self, attrs: &Attributes<'_>, id: &Id, ctx: Context<'_, S>)
Notifies this layer that a new span was constructed with the given
Attributes
and Id
. Read more
sourcefn on_record(&self, _span: &Id, _values: &Record<'_>, _ctx: Context<'_, S>)
fn on_record(&self, _span: &Id, _values: &Record<'_>, _ctx: Context<'_, S>)
Notifies this layer that a span with the given Id
recorded the given
values
. Read more
sourcefn on_follows_from(&self, _span: &Id, _follows: &Id, _ctx: Context<'_, S>)
fn on_follows_from(&self, _span: &Id, _follows: &Id, _ctx: Context<'_, S>)
Notifies this layer that a span with the ID span
recorded that it
follows from the span with the ID follows
. Read more
sourcefn on_event(&self, _event: &Event<'_>, _ctx: Context<'_, S>)
fn on_event(&self, _event: &Event<'_>, _ctx: Context<'_, S>)
Notifies this layer that an event has occurred.
sourcefn on_enter(&self, _id: &Id, _ctx: Context<'_, S>)
fn on_enter(&self, _id: &Id, _ctx: Context<'_, S>)
Notifies this layer that a span with the given ID was entered.
sourcefn on_exit(&self, _id: &Id, _ctx: Context<'_, S>)
fn on_exit(&self, _id: &Id, _ctx: Context<'_, S>)
Notifies this layer that the span with the given ID was exited.
sourcefn on_close(&self, _id: Id, _ctx: Context<'_, S>)
fn on_close(&self, _id: Id, _ctx: Context<'_, S>)
Notifies this layer that the span with the given ID has been closed.
sourcefn on_id_change(&self, _old: &Id, _new: &Id, _ctx: Context<'_, S>)
fn on_id_change(&self, _old: &Id, _new: &Id, _ctx: Context<'_, S>)
Notifies this layer that a span ID has been cloned, and that the subscriber returned a different ID. Read more
sourcefn and_then<L>(self, layer: L) -> Layered<L, Self, S> where
L: Layer<S>,
Self: Sized,
fn and_then<L>(self, layer: L) -> Layered<L, Self, S> where
L: Layer<S>,
Self: Sized,
Composes this layer around the given Layer
, returning a Layered
struct implementing Layer
. Read more
sourcefn with_subscriber(self, inner: S) -> Layered<Self, S> where
Self: Sized,
fn with_subscriber(self, inner: S) -> Layered<Self, S> where
Self: Sized,
Composes this Layer
with the given Subscriber
, returning a
Layered
struct that implements Subscriber
. Read more
sourcefn with_filter<F>(self, filter: F) -> Filtered<Self, F, S> where
Self: Sized,
F: Filter<S>,
fn with_filter<F>(self, filter: F) -> Filtered<Self, F, S> where
Self: Sized,
F: Filter<S>,
Auto Trait Implementations
impl RefUnwindSafe for Identity
impl Send for Identity
impl Sync for Identity
impl Unpin for Identity
impl UnwindSafe for Identity
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> ToOwned for T where
T: Clone,
impl<T> ToOwned for T where
T: Clone,
type Owned = T
type Owned = T
The resulting type after obtaining ownership.
sourcefn clone_into(&self, target: &mut T)
fn clone_into(&self, target: &mut T)
Uses borrowed data to replace owned data, usually by cloning. Read more